Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1984-04-25
1986-12-23
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record medium
In container
360 746, G11B 2302
Patent
active
046316183
ABSTRACT:
A tape cassette with a tape beginning and tape end detecting mechanism is provided wherein a lid is pivotally supported by the cassette casing at its opposite sides to removably cover the front opening of the cassette casing. A sensor chip which forms an optical path is disposed inside and near each of the sides of the cassette casing and a first aperture is formed through each of the sides to expose a part of the sensor chip. A second aperture is formed through each of the sides of the lid. The first and second apertures are located such that when the lid is opened, the first and second apertures become coincident with one another in position, while when the lid is closed, the first and second apertures are displaced relative to one another, and the first aperture is covered by the lid to thereby protect the sensor chip.
REFERENCES:
patent: 3615155 (1971-10-01), Gelbman
patent: 3638955 (1972-02-01), Wada
patent: 3705699 (1972-12-01), Siller
patent: 4032987 (1977-06-01), Singer et al.
patent: 4091426 (1978-05-01), Umeda
patent: 4343024 (1982-08-01), Kawai
patent: 4363059 (1982-12-01), Matsuzawa et al.
patent: 4524926 (1985-06-01), Nemoto et al.
Nonoyama Hideki
Ozawa Kazuo
Sniezek Andrew L.
Sony Corporation
Tupper Robert S.
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